diff --git a/release/c/wuffs-v0.3.c b/release/c/wuffs-v0.3.c
index 71d5c7c..7d40cfa 100644
--- a/release/c/wuffs-v0.3.c
+++ b/release/c/wuffs-v0.3.c
@@ -85,15 +85,15 @@
 // each major.minor branch, the commit count should increase monotonically.
 //
 // WUFFS_VERSION was overridden by "wuffs gen -version" based on revision
-// 00d5e35865a2f2718f4bb2596adaaa54bd639bbe committed on 2023-04-08.
-#define WUFFS_VERSION 0x000030003
+// a138188d5742c0469de983878a430bdbe7e50e77 committed on 2024-04-19.
+#define WUFFS_VERSION 0x000030004
 #define WUFFS_VERSION_MAJOR 0
 #define WUFFS_VERSION_MINOR 3
-#define WUFFS_VERSION_PATCH 3
+#define WUFFS_VERSION_PATCH 4
 #define WUFFS_VERSION_PRE_RELEASE_LABEL ""
-#define WUFFS_VERSION_BUILD_METADATA_COMMIT_COUNT 3399
-#define WUFFS_VERSION_BUILD_METADATA_COMMIT_DATE 20230408
-#define WUFFS_VERSION_STRING "0.3.3+3399.20230408"
+#define WUFFS_VERSION_BUILD_METADATA_COMMIT_COUNT 3401
+#define WUFFS_VERSION_BUILD_METADATA_COMMIT_DATE 20240419
+#define WUFFS_VERSION_STRING "0.3.4+3401.20240419"
 
 // ---------------- Configuration
 
@@ -41569,20 +41569,22 @@
           self->private_impl.f_seen_srgb = true;
         }
       } else if (self->private_impl.f_chunk_type == 1397641844) {
-        if (self->private_impl.f_seen_trns || (self->private_impl.f_color_type > 3) || ((self->private_impl.f_color_type == 3) &&  ! self->private_impl.f_seen_plte)) {
+        if (self->private_impl.f_seen_trns || ((self->private_impl.f_color_type == 3) &&  ! self->private_impl.f_seen_plte)) {
           status = wuffs_base__make_status(wuffs_png__error__bad_chunk);
           goto exit;
-        }
-        if (a_src) {
-          a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
-        }
-        WUFFS_BASE__COROUTINE_SUSPENSION_POINT(9);
-        status = wuffs_png__decoder__decode_trns(self, a_src);
-        if (a_src) {
-          iop_a_src = a_src->data.ptr + a_src->meta.ri;
-        }
-        if (status.repr) {
-          goto suspend;
+        } else if (self->private_impl.f_color_type > 3) {
+        } else {
+          if (a_src) {
+            a_src->meta.ri = ((size_t)(iop_a_src - a_src->data.ptr));
+          }
+          WUFFS_BASE__COROUTINE_SUSPENSION_POINT(9);
+          status = wuffs_png__decoder__decode_trns(self, a_src);
+          if (a_src) {
+            iop_a_src = a_src->data.ptr + a_src->meta.ri;
+          }
+          if (status.repr) {
+            goto suspend;
+          }
         }
         self->private_impl.f_seen_trns = true;
       }
diff --git a/sync.txt b/sync.txt
index 3372141..dd9188f 100644
--- a/sync.txt
+++ b/sync.txt
@@ -1,10 +1,10 @@
-script/sync.sh ran on 2024-04-11
-Sibling directory (../wuffs) git revision is f1698226806569eb45ea009deee89a108f8d5395
+script/sync.sh ran on 2024-04-19
+Sibling directory (../wuffs) git revision is a3bfb57003d4ff0534fd9de447ebc60800b7b616
 Manifest (sha256sum values, filenames, versions):
 994126492f24a3edae9b95efa92820647cedc42ee933ce3ff2a364fa9c62aba3  release/c/README.md
 3b6a0c78f663bb495d1972fbb2a87c717d70fbac5ea8cc1a50cb9afaa4b03f92  release/c/wuffs-v0.2.c
     #define WUFFS_VERSION_STRING "0.2.0+2078.20191219"
-ca10c422ebd4bf9f2cc469bafec4d5606eed3db0db7cbe21cb5232249ac0fe68  release/c/wuffs-v0.3.c
-    #define WUFFS_VERSION_STRING "0.3.3+3399.20230408"
+a3db4bd979663423de00309d1ba07d7fa8576845223d3e02764181bd6da23f90  release/c/wuffs-v0.3.c
+    #define WUFFS_VERSION_STRING "0.3.4+3401.20240419"
 035155b1a3c3ca855f9f5b87d2f356dab662e4403566425b7feafd3011d2c86a  release/c/wuffs-v0.4.c
     #define WUFFS_VERSION_STRING "0.4.0-alpha.4+3742.20240406"